seth doane, cbs news, culpepper, virginia. >> pelley: and that's the "cbs evening news" for this day of history. for all of us at cbs news all around the world, good night. capt >>> six young lives cut short by violence in just six months time. two of them attended the same high school and were killed just 24 hours apart. tonight, we are going in depth on the senseless string of tragedies rocking prince georges county, maryland. just a short time ago, prince georges county police announced they have arrested five suspects and charged each of them with murder in connection with the shooting death of charles walker, jr. he was one of two suitland high students killed this week. c.j. was shot and killed yesterday for a pair of shoes. >> criminals need to know if they come to this county and commit senseless acts of violence, we will find them and bring them to justice. >> these are